I-EPS i-granular thermal insulation mortar iyisisetshenziswa sokushisa esilula esixutshwe ne-inorganic binder, i-organic binder, i-admixture, ingxubevange kanye nokuhlanganisa okukhanyayo ngengxenye ethile. Ocwaningweni lwamanje nasekusetshenzisweni kodaka lwezinhlayiyana ze-EPS, impushana ye-latex ekwazi ukuphinda ihlakazwe kabusha inethonya elikhulu ekusebenzeni kodaka futhi ithatha inani eliphakeme kakhulu ezindlekweni, ngakho bekulokhu kugxilwe kukho. Ukusebenza okuhlanganisayo kwe-EPS particle thermal insulation mortar yangaphandle system thermal insulation system ikakhulukazi ivela ku-polymer binder, futhi ingxenye yayo ikakhulukazi i-vinyl acetate/ethylene copolymer. Lolu hlobo lwe-emulsion ye-polymer lungomiswa ukuze kutholwe impushana ye-latex ehlakazeka kabusha. Ngenxa yokulungiswa okunembile kwempushana ye-latex ehlakazeka kabusha ekwakhiweni, ezokuthutha ezikahle kanye nesitoreji esikahle, impushana exegayo yama-polymers isiphenduke inkambiso yentuthuko ngenxa yokulungiselela kwayo okunembayo, ukuthuthwa okukahle kanye nesitoreji esikahle. Ukusebenza kwe-EPS particle insulation mortar kuncike kakhulu ohlotsheni nenani le-polymer esetshenzisiwe. I-Ethylene-vinyl acetate latex powder (EVA) enokuqukethwe okuphezulu kwe-ethylene kanye nenani eliphansi le-Tg (i-glass transition lokushisa) inezakhiwo ezingcono ngokwamandla omthelela, amandla ebhondi kanye nokumelana namanzi.
Ukwenziwa kahle kokusebenza kwe-latex powder ehlakazeka kabusha odakeni kungenxa yokuthi i-polymer powder iyi-polymer ephezulu yamangqamuzana enamaqembu e-polar. Uma i-RDP ixubene nezinhlayiya ze-EPS, ingxenye engeyona i-polar ochungechungeni oluyinhloko lwe-polymer powder izokhangiswa ngokomzimba nge-non-polar surface ye-EPS. Amaqembu e-polar ku-polymer aqondiswe ngaphandle ebusweni bezinhlayiya ze-EPS, okwenza izinhlayiya ze-EPS zishintshe ukusuka ku-hydrophobic kuya ku-hydrophilic. Ngenxa yokuguqulwa kobuso bezinhlayiya ze-EPS nge-polymer powder, inkinga yokuthi izinhlayiya ze-EPS kulula ukuhlangabezana namanzi iyaxazululwa. Ukuntanta, izinkinga ezinkulu ze-delamination yodaka. Ngalesi sikhathi, lapho wengeza usimende nokushukumisa, amaqembu e-polar adsorbed ebusweni bezinhlayiya ze-EPS asebenzisana nezinhlayiya zikasimende futhi ahlangane eduze, okuthuthukisa kakhulu ukusebenza kwe-EPS insulation mortar. Lokhu kubonakala eqinisweni lokuthi izinhlayiya ze-EPS zimanziswa kalula udaka lukasimende, futhi amandla okubopha phakathi kokubili athuthukiswa kakhulu.
Ngemuva kokuthi i-emulsion kanye nempushana ye-latex ehlakazeka kabusha kwakhiwa ifilimu, ingakha amandla aphezulu okuqinile namandla okubopha ezintweni ezahlukene. Asetshenziswa njengesibophezelo sesibili odakeni ukuze kuhlanganiswe ne-inorganic binder usimende, usimende ne-polymer ngokulandelana. Dlala amandla ahambisanayo futhi uthuthukise ukusebenza kodaka. Ngokubheka i-microstructure ye-polymer-cement composite material, kubhekwa ukuthi ukungezwa kwe-latex powder ephindwe kabusha kungenza ifilimu ye-polymer ibe yingxenye yodonga lwembobo, futhi yenze udaka lwakhiwe lonke ngokusebenzisa amandla angaphakathi, okuthuthukisa ingaphakathi. amandla odaka. Amandla e-polymer, ngaleyo ndlela akhulise ingcindezi yokwehluleka kodaka futhi akhulise ubunzima bokugcina. Ukutadisha ukusebenza kwesikhathi eside kwe-latex powder odakeni, okubonwa ngokuskena i-electron microscope, ngemva kweminyaka eyi-10, i-microstructure ye-polymer odakeni ayizange ishintshe, igcina ukuhlangana okuzinzile, amandla aguquguqukayo namandla okucindezela kanye ne-Hydrophobic enhle. . Ukuthatha i-latex powder ehlakazeka kabusha njengento yocwaningo, kwafundwa indlela yokwakheka kwamandla okubopha amathayili, futhi kwatholakala ukuthi ngemva kokuba i-polymer isomisiwe ibe ifilimu, ifilimu ye-polymer yenza uxhumano oluguquguqukayo phakathi kodaka kanye nethayela ngakolunye uhlangothi. , futhi ngakolunye uhlangothi, ama-polymers odakeni akhulisa okuqukethwe komoya odakeni, okuthinta ukucaba kanye nokumanzisa kwendawo, futhi kamuva phakathi nenqubo yokubeka, ama-polymers nawo ane umphumela omuhle ohlelweni lwe-hydration kanye nokushwabana kukasimende. Ama-Adhesives, konke lokhu kusiza ukukhulisa amandla esibopho.
Ukwengeza impushana ye-latex ehlakazeka kabusha odakeni kungathuthukisa kakhulu amandla okubopha nezinye izinto, ngoba isigaba soketshezi se-hydrophilic polymer powder kanye nokumiswa kukasimende singena ezimbotsheni nasemacapillari e-matrix, kuyilapho i-latex powder ingena ezimbotsheni nase-E. i-capillary. Ifilimu yangaphakathi iyakhiwa futhi ikhangiswe ngokuqinile ebusweni be-substrate, ngaleyo ndlela iqinisekise amandla amahle okubopha phakathi kwe-gelled material kanye ne-substrate.
Isikhathi sokuthumela: Jun-16-2023